Do the bike rental locations around the city in Florence include children's bikes? Our daughter will be 9 when we travel to Florence in April 2013 and we're thinking of renting bikes at some stage but only if we can get a smaller bike for her.
I took the liberty of conctacting Florencebybike, one of the services that I know for sure have several bikes availble to rent in Florence.
They just answered that, yes, they do have children bikes : "children bikes are available under previous reservations, all equipped with helmets and locks. Liability insurance included. Different frame size are available."
Another bike shop in Florence that has a bike rental service is Probike, you can contact them through their website www.probike.it.
Hope you will have a great biking trip in Tuscany with your children, come back and tell us about it when you can!